No problem with ECS C/S or quality. I recently replaced the rear rotors on my E92 only to discover after the install that the inner diameter of the "hat" was incorrect and my parking brake would not engage. Called to inquire via their tech support. They realized their mistake and shipped replacements. Rotors have bedded in well and I do not believe that in five years they will look any worse than the factory pieces did.

Don't freak out by the fact that they were made in China and Taiwan. Keep in mine that almost everything in the computer that you are posting from was probably made in China.

I used to be in the hard drive business. You can't believe how incredibly complex an average, run-of-the-mill hard drive is. I mean, the tolerances are insane. The technology is ridiculously advanced. And they are mostly made in China and SE Asia (but mostly China).

OP... If you arn't questioning their performance or quality of their rotors... Then whats the problem? Who gives a shit where they come from? I mean if anything... Your kind of crazy to buy "US products" and pay $230 just in shipping when you live in GERMANY lol...

+1

Why would you ever spend that much on shipping "pretty" non-OEM or no high performance parts is beyond me.

Test them out and report back. Right now you are assuming that they are sub-standard quality. Take a look at rusty OEM brake calipers. Is that acceptable on 50K+ car? Still, they perform well.

Since we live in a world of global trade and economy, companies have operations across the world. Brands are not tied to mother contries any more since they started outsourcing. As an example, check out Harley Davidson manfacturing sites. Also check out BMW manufacturing sites.

I bought several items from ECS and found them to have excellent deals and great customer service. I bought my front rotors from them but they are OEM z4 35is since I didn't want to deal (accept the risk) with potential issues.

No problem with ECS C/S or quality. I recently replaced the rear rotors on my E92 only to discover after the install that the inner diameter of the "hat" was incorrect and my parking brake would not engage. Called to inquire via their tech support. They realized their mistake and shipped replacements. Rotors have bedded in well and I do not believe that in five years they will look any worse than the factory pieces did.

As I wrote already, I was overall happy with their C/S; they were fast and comprehensive at the end.
And I'm sure they have good products in their range; my purpose is not to slap them.
But, once again, I want to stress that imho it is not fair to write a lot of "made in the US" or so when the item is actually produced in the states, and simply forget the country of origin in case the item is outsourced. While this is totally secondary for floor mats or light bulbs, I do care of where/how/by whom my brake rotors are manufactured.

question though. and this is where i think it might be ok, not big on but ok, manufactured in taiwan/china but tested in the states?

You catch a very good point, which is being missed by many readers.
Where is the quality control/test performed?
I think we cannot conclude about this, based on the answer we have had up to now.
My understanding is the following:

Engineering: ECS states it is done in the USA. I'm happy with it

Manufacturing of the rotor blank: ECS states it can be done in US, Italy, Brazil, China or Taiwan, depending on the application. Here we have the 1st problem: also Brembo has plants in China; the difference here is made by how you control what is done in the plant. Despite somebody said that to build a brake rotor "is not rocket science", believe me guys there is a lot to take care of when producing a metal alloy, when forming the piece of metal, when heat treating it, and working to the desired shape. As far as I know, this is not done by ECS people at the factory (wherever it is), they state the quality control is made once the blanks reach ECS for final reworking. Anybody with a minimum experience in production processes can understand that the amount and quality of checks that one can perform outside the production line is very limited. I have to assume that ECS relyes on the contracts with the suppliers and the certificates the chinese or taiwanese produce to ensure that the manufacturing and first part of machining is done properly, then supplementing this with some kind of check once the raws are shipped to the US

Final reworking: ECS states is it done in the US by qualified companies. This seems to include the drilling, the slotting, and the coating (if applicable). I'm happy with it,,but does it include coulpling of rotors and hats? Does it include testing of the final item? What are exactly the checks that are performed on the raws coming from Asia? I still don't know.

A final side note: I may understand that many vendors claim that nobody declares exactly who are the suppliers and where the brakes are actually produced. I may understand that it sounds stupid to be the only company to declare exactly the full origins. I don't have anything against ECS. I only know that I have 4 rotor still in the box with a "made in China" stamp on them. That's it. What the other companies in the tuning panorama do, I don't know and I don't care, it is not my business.

Our 2-piece rotors are manufactured largely in the United States, with some applications being manufactured in Taiwan. Regardless of manufacturing location, our rotors are designed in-house by the engineers in our Research & Development Department. We are dedicated to the quality of our product line and invests countless hours of engineering, testing, and quality control to ensure our products meet our standards.

how do you ensure that correct forming has been performed in the Chinese/Taiwanese/wherever foundry

how do you verify that the proper heat treatment has been applied in the Chinese/Taiwanese/wherever plant

how do you check that blanks have been handled properly

and so on...

As you can see, it'a all about details.
Answer to this and, be sure, I will be happy.

how do you ensure all this in the US? Have you heard of quality control and those kinds of checks? OP you sound butt hurt, get over it, I would be concerned if they were shit quality or you were having issues. Which it appears you are not, time to move on. As previously said, you are in europe why not buy locally?

how do you ensure all this in the US? As previously said, you are in europe why not buy locally?

I've been working in the US and know well the quality standards which are used there.
Not the same is done in other places, China and Taiwan included (not always, of course).
I wonder if you ever heard about ISO 140001 or ISO 9001...

Rolls Royce Canada, manufacturer of engines as found on aircraft like the Gulfstream G-IV outsources their turbine blades to China.
68% of the blade assemblies that pass Chinese QC and ship will not pass QC at Rolls Royce. That is almost 7 out of 10 blade assemblies go right in the trash.
And these are 6 figure prices each.

Just out of curiosity though - there wasn't anything similar in the Netherlands or Germany?

Rolls Royce Canada, manufacturer of engines as found on aircraft like the Gulfstream G-IV outsources their turbine blades to China.
68% of the blade assemblies that pass Chinese QC and ship will not pass QC at Rolls Royce. That is almost 7 out of 10 blade assemblies go right in the trash.
And these are 6 figure prices each.

Just out of curiosity though - there wasn't anything similar in the Netherlands or Germany?

...and probably they make money anyway from it!

You see, somebody understands EXACTLY what I mean.

Regarding the European kits, i have to say that many other options are available (e.g., the BMW Performance rotors), but to say the truth no kit offers the same specs/price ratio and is available for both front and rear from the same vendor. Brembo BBK (or similar kits) was not an option due to the cost (in excess of 3000 usd). The favourable exchange ratio USD/EUR had a role, too. And, finally, I've experienced always exceptional results with "made in USA" stuff.